restructuring - renamed warp_apply into ft_warp_apply (idem for warp_optim and warp_error), updated all calls to these functions, made compatibility wrappers in utilities/compat. See http://bugzilla.fcdonders.nl/show_bug.cgi?id=316


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@8753 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0